TW594279B - Light source device - Google Patents

Abstract

A light source device comprising a light guide (3) for guiding a primary light-source light and slantingly outputting it form an output surface (33), and alight deflection element (4) disposed adjacent to the light output surface, a plurality of parallel prism rows being formed on the light incident surface (41) of the light deflection element. A prism plane on a distal side of the primary light source has a convexly-curved surface shape with respect to a virtual prism row configuration, when assuming a virtual prism row (I) which receives at one prism plane a peak output light in an output light distribution from the light guide's output surface, totally reflects it internally off the other prism plane, and outputs the reflected light via an output surface (42) in a desired direction, and which is arranged at the same pitch as the prism row arranging pitch of the light deflection element with a vertical angle of 50-70 DEG. A value (r/P) of radius r of curvature standardized by the arranging pitch P of a prism row is 7-30, and a ratio (d/P) between a maximum distance d from a prism plane to the prism plane of the virtual prism row (I) and the arranging pitch P of a prism row is 0.05-5%.

Description

594279 Λ7 B7 ^ _I__ Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 8 6 2 2pif.doc / 008 Description of the Invention (I) Technical Field The present invention relates to a light source device for edge light. A liquid crystal display device for a display of a notebook computer or a liquid crystal television, and more particularly, relates to a light deflection element disposed on a light exit surface side of a light guide. BACKGROUND ART In recent years, color liquid crystal display devices have been widely used in various fields, such as monitors of portable notebook computers and personal computers, and monitors such as liquid crystal televisions or video-type liquid crystal televisions. Furthermore, with the increase in information processing volume, diversified demands, and multi-media response, liquid crystal display devices are moving towards larger screens and higher definition. Basically, a liquid crystal display device is composed of a back light device and a liquid crystal display element. There are two types of backlight devices: direct-lit and edge-lit. The direct light type places the light source directly below the liquid crystal display element, while the edge light type places the light source at the side end face facing the light guide. From the viewpoint of compactness of a liquid crystal display device, the edge-light type is mostly used. However, in recent years, a liquid crystal display device used in a display of a mobile phone is a display device with a small screen size, and its observation range is narrow. From the standpoint of reducing power consumption, in order to enable the edge-light type backlight device to effectively use light emitted from a primary light source, it is possible to reduce the amplitude angle of the light beam emitted from the screen and reduce the concentration as much as possible. To the desired angle range and let the light exit, 4 -------------------- Order --------- line (Please read the note on the back first Please fill in this page again for the matters) This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 Λ7 B7 8622pif.doc / 008 5. Description of the invention). (Please read the precautions on the back before filling out this page.) As mentioned above, in the display device with a limited viewing direction range, 5 In order to improve the light utilization efficiency of the primary light source and reduce power consumption, the applicant of this patent in Japan Patent No. 2000 No. -265574 proposes a light source device that enables light to be emitted in a narrow range, and uses a prism sheet having two conical surfaces on a light exit surface adjacent to a light guide. One of the two-sided cymbals is a light-incident surface and the other is a light-emitting surface, and a plurality of queues are formed in parallel with each other. The light incident surface and light emitting surface are aligned with the queue direction, and the queues are arranged at corresponding positions. According to this, the peak chirped light of the emitted light is maintained from the light exit surface of the light guide body and inclined to the direction of the light exit surface, and the emitted light is distributed within an appropriate angular range. The above-mentioned outgoing light is incident from the plane on the diaphragm as the light-incident surface, and is internally reflected on the other plane; then, it is refracted at the plane of the light-emitting surface, so that the light can be narrowed to the expectation. Focused shot. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed this type of light source device. Although it can make the light concentrated in a narrow angle and emit 1, it can be used as a light deflection element. The individual planes on the mirror array are arranged parallel to the corresponding planes. The light-incident and light-exit surfaces must be in the same direction as the queues1, and the rows are arranged at corresponding positions.1 This changes the structure. It's quite complicated. In addition, when the light emitted from the light guide is deflected by the cymbals, in order to improve the light collection or directionality of the light, the queues constituting the cymbals will be separated from the light source. The surface is made into a convex curved surface, which has been published in Japanese Patent Special Publication No. 9-507584. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 x 297 mm 594279 Λ7 B7 8622pif.doc / 008 V. Description of the invention (7)), Japanese Patent Application Laid-Open No. 9-105804, Japanese Patent Application Laid-Open No. 1 1-38209, Japanese Patent Application Laid-Open No. 2000-35763, and the like are disclosed. However, because the curvature radius of the convex curved surface described above is larger or smaller, the requirements for sufficiently narrow field of view or extremely narrow field of view cannot be met from the light distribution of the light guide; Instead, it becomes a wide field of vision. In addition, the light emitting mechanism of the light guide described above does not have high directivity. Due to the wide distribution of the emitted light, even if the light is collected through the diaphragm, the brightness cannot be sufficiently improved. Disclosure of the Invention _ The object of the present invention is to provide a light source device whose distribution of emitted light is controlled to be very narrow, which can improve the utilization efficiency of the light quantity of a primary light source (ie, make the light emitted from the primary light source) , The efficiency of concentrated emission in the direction to be observed is high), the brightness is extremely high, and a simple structure can easily enhance the taste of the image. In order to achieve the above object of the present invention, the present invention provides a light source device including a primary light source; a light guide body having a light incident surface and a light exit surface, so that the light emitted by the primary light source, from the light The incident surface is incident, and the incident light passes through the light guide and exits from the light exiting surface; and the light deflection element is adjacent to the light exiting surface of the light guide and is disposed on the light exiting surface facing the light guide. A light incident surface is provided at the position, and a light emitting surface is provided on the opposite side of the light incident surface. Wherein, a plurality of queues arranged side by side on the light incident surface are formed, and the queues each have two queues; when a plurality of imaginary queues are arranged to be aligned with the light deflection elements, Alignment pitch of the line 6 This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) ----- ---- Order --------- Line · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, printed 594279 by the Ministry of Economic Affairs. 5. Description of the Invention (α) Arranged at the same pitch, and the top angle Θ From 50 to 70 hours, in the distribution of the light emitted from the light exit surface of the light guide body among the light surfaces on the far side of the primary light source, the peak light emitted from one of the light sources is The plane is incident, and is totally reflected on the other plane by the inner surface, and then exits from the light emitting surface in the desired direction; according to the imaginary queue, at least one of the planes is made into a convex curved surface shape, The radius of curvature r of the convex curved surface is determined by the arrangement pitch of the queues. After formalization to Zhi (r / p) is 7~30. The convex surfaces of the convex curved shapes of the above-mentioned light deflection elements, and the maximum distance d of the imaginary queues of the ridges and the pitch P of the ridges. The ratio (d / p) is 0.05 ~ 5%. In the imaginary queues, the inclination angle of the planes close to the primary light source side is 45 degrees or more. The imaginary queues are isosceles triangles. The light exit surface of the light guide body and / or the opposite back surface thereof has a directional light exit function surface. The average inclination angle of the directional light exit function surface is 0.5 to 15 °. The directional light emitting functional surface is a rough surface or is arranged by a plurality of lens rows. -The present invention further provides a light source device including a primary light source; a light guide having a light incident surface and a light exit surface, and the light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light And the light deflection element is disposed adjacent to the light exit surface of the light guide body, and has a light entrance surface at a position facing the light exit surface of the light guide body. A light emitting surface is provided on the opposite side of the light surface. Among them, a number of 7 paper sheets are arranged side by side on the light incident surface. The paper size is applicable to the Chinese National Standard (CNS) Ai specification (210 X 297 mm) (Please read the precautions on the back before filling this page) 4 -------- Order -------- Xiantai 594279 Λ7 B7 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 8622pif.doc / 〇〇8 发明 列 ，, The queues each have two sides; when a plurality of imaginary queues are aligned at the same pitch as the array pitch of the light deflection elements, and the vertex angle Θ is 50-70. , Then in the distribution of light emitted from the light source on the faster side of the primary light source such that the light emitted from the light exit surface of the light guide is emitted from one of the surfaces , And is totally reflected on the other surface by the inner surface, and then exits from the light emitting surface in the desired direction; according to the imaginary queue, at least one of the surfaces is made into a convex curved shape, in which the light Deflections of the convex surfaces of the convex surfaces of the elements, and the hypotheses The ratio (d / p) of the maximum distance d of the queues to the queue pitch P of the queues is zero. 2 ~ 2%. The queues described above have a common bottom with the imaginary queues. The convex curved surface shape is a slightly cylindrical convex shape, and the radius of curvature r is normalized by the array pitch P of the queues. (R / p) is 2 to 80. In the imaginary queues, the inclination angle of the planes close to the primary light source side is 45 degrees or more. The imaginary queues are isosceles triangles. The light emitting surface of the light guide body and / or the opposite back surface thereof has a directional light emitting functional surface. The average inclination angle of the directional light emitting functional surface is 0.5 to 15 °. The directional light emitting functional surface is a rough surface or is formed by a plurality of lens rows. -The present invention further provides a light source device including a primary light source; a light guide having a light incident surface and a light exit surface, so that light emitted by the primary light source is incident from the light incident surface, and the incident light passes through the light guide , The light exits from the light exit surface; and the light deflection element is the light output 8 adjacent to the light guide. The paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 public love) ---- ---------------- Order --------- line (please read the notes on the back before filling this page) 594279 Λ7 B7 8622pif.doc / 008 V. Description of the invention (t) The light emitting surface has a light incident surface at a position facing the light emitting surface of the light guide, and has a light emitting surface on the opposite side of the light incident surface. Wherein, a plurality of queues arranged side by side are formed on the light incident surface, and the queues each have two queues; at least one of the queues has a convex curved surface shape, so that an imaginary light passes by. On the top of the imaginary ridge adjacent to the peak 値 direction of the outgoing light distribution of the light emitted from the light exit surface of the light guide, an inner surface on the other ridge surfaces of the imaginary queues The total reflection position is closer to the light emitting surface than the inner total reflection position. At least a part of the slanting surfaces is at an inclination angle formed by the slanting surfaces facing the light emitting surface than the hypothetical queues. Large tilt angle. The queues described above have a common bottom with the imaginary queues. The convex curved surface shape is a slightly convex cylindrical shape, and the radius of curvature r is normalized by the array pitch P of the queues.値 (r / p) 2 ~ 80. The ratio of the maximum distance d of the convex surfaces of the light deflection elements to the convex surfaces of the queues and the virtual surfaces of the imaginary queues to the alignment pitch P of the queues (d / p) is 0.05 to 5%. [In the imaginary queues, the inclination angle of the surfaces near the primary light source side is 45 degrees or more. The sections of these imaginary queues are isosceles triangles. The exit surface of the light guide body and / or the opposite back surface thereof has a directional light exit function surface. The average inclination angle of the directional light emitting functional surface is 0.5 to 15 °. The surface of this directional light emitting function is a rough surface or an array of a plurality of lens rows. The present invention further provides a light source device, including a primary light source; light guide 9 (please read the precautions on the back before filling this page)

Jf -------- Order --------- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economics, this paper is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 8622pife doc / 008 5. The invention (1) has a light incident surface and a light exit surface. The light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light. Light is emitted from the light exit surface; and a light deflection element is disposed adjacent to the light exit surface of the light guide, and a light entrance surface 5 is located at a position facing the light exit surface of the light guide. A light emitting surface is provided on the opposite side of the light incident surface. Wherein, a plurality of queues arranged side by side on the light incident surface are formed, and the queues each have two queues; when a plurality of imaginary queues are arranged to be aligned with the light deflection elements, The arrangement of the queues is arranged at the same pitch, and when the vertex angle Θ is 50 to 70, the light planes on the far side from the primary light source make the light exit from the light exit surface of the light guide. In the outgoing light distribution of the emitted light, the peak outgoing light is incident from one of the planes, and is totally reflected by the inner plane on the other plane, and then exits from the outgoing plane in the desired direction; according to the hypothesis, Row, at least one of the surfaces is made into a convex curved shape. The light exiting surface of the light guide and / or the opposite side of the light guide has a directional light exiting functional surface, and the average inclination angle of the directional light exiting functional surface is 0. 5 ~ 15 °. -The queues described above have a common bottom with the imaginary queues, the convex curved surface shape is a slightly convex cylindrical surface shape, and the radius of curvature r is normalized by the array pitch P of the queues値 (r / p) is 2 ~ 80. The ratio of the maximum distance d of the convex surfaces of the light-deflecting elements to the convex surfaces of the queues and the virtual surfaces of the imaginary queues to the alignment pitch P of the queues (d / p) is 0. 05 ~ 5 ° /. By. In the imaginary queues, the inclination angles of the planes close to the primary light source side are -------------------- order ------- --Line (Please read the notes on the back before filling this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumer Cooperatives This paper is printed in accordance with China National Standard (CNS) A4 (210 X 297 mm) 594279 5 Λ7 B7 Economy The Consumer Cooperatives of the Ministry of Intellectual Property Bureau printed 8622pif. doc / 〇08 Description of the invention (J) 45 degrees or more. The sections of these imaginary queues are isosceles triangles. The surface of this directional light exit function is a rough surface or an array of a plurality of lens rows. The present invention further provides a light source device including a primary light source; a light guide body having a light incident surface and a light exit surface. The light emitted by the primary light source is incident from the light incident surface, and the incident light passes through the light guide. A light deflection element is disposed adjacent to the light exit surface of the light guide body, and a light incident surface is provided at a position facing the light exit surface of the light guide body; The opposite side of the surface has a light emitting surface, in which the half width 半 B of the light emitted from the light emitting surface of the light guide in a plane perpendicular to the light incident surface and the light emitting surface is 36 ° or less, And the half width 値 A of the light emitted from the light exit surface of the light deflection element in the plane perpendicular to the light incidence surface and the light exit surface is 30 to 95% of the half width 値 B. The half width 値 A of the light emitted from the light exit surface of the light deflection element in the plane perpendicular to the light incidence surface and the light exit surface is 30 to 80% of the half width 値 B. The half width 値 A of the light emitted from the light exit surface of the light deflection element in a plane perpendicular to the light incident surface and the light exit surface is 30 to 70% of the half width 値 B. The half-width 値 A of the distribution of the light emitted from the light-emitting surface of the light deflection element perpendicular to the light-incident surface and the light-emitting surface is 5 to 25 degrees. As described above, a plurality of queues arranged side by side on the light incident surface are formed, and the queues each have two queues; when the plurality of imaginary queues are arranged to be aligned with the light deflection elements, Queues with the same spacing --------------------- Order --------- line (Please read the precautions on the back before filling (This page) This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 Five employees of the Intellectual Property Office of the Ministry of Economic Affairs, consumer cooperation Du printed 8622pif. doc / 008, invention description (q) pitch arrangement, and the apex angle Θ is 50 ~ 70, then the light planes farther from the primary light source make the light exit from the light exit surface of the light guide In the outgoing light distribution of the emitted light, the peak outgoing light is incident from one of the planes, and is totally reflected by the inner plane on the other plane, and then exits from the outgoing plane in the desired direction; according to the hypothesis, Row, at least one of the surfaces is made into a convex curved shape. The queues described above have a common bottom with the imaginary queues. The convex curved surface shape is a slightly convex cylindrical shape, and the radius of curvature r is normalized by the array pitch P of the queues.値 (r / p) is 2 ~ 80. The ratio of the maximum distance d between the convex surfaces of the queues of the light deflection element and the edges of the imaginary queues to the arrangement pitch P of the queues ( d / p) is 0. 05 ~ 5%. In the imaginary queues, the inclination angle of the planes close to the primary light source side is 45 degrees or more. Those imaginary queues have an isosceles triangle. The light emitting surface of the light guide body and / or the opposite back surface thereof has a directional light emitting functional surface. The average inclination angle of the surface of this directional light exit function is 0. 5 ~ 15 °. The surface of this directional emission function is a rough surface or an array of a plurality of lens rows. The present invention further provides a light source device including a primary light source; a light guide body having a light incident surface and a light exit surface. The light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light. The light exit surface from the light exit surface and the light deflection element are arranged adjacent to the light exit surface of the light guide, and a light entrance surface is provided at the position facing the light exit surface of the light guide. A light emitting surface is provided on the opposite side of the light surface. 12 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) 594279 Λ7 B7 8 6 2 2pif.  doc / 008 V. Description of the invention (! °) (Please read the precautions on the back before filling out this page) The light emitted from the light exit surface of the light guide is perpendicular to the light entrance surface and the light exit surface The half-width 値 B of the outgoing light distribution in the plane exceeds 36 °, and the half-width 的 A of the outgoing light distribution in the plane perpendicular to the light incident surface and the light exit surface of the light deflection element is 値 A It is 30 to 70% of the half-width 値 B. The half width 値 A of the light emitted from the light exit surface of the light deflection element in the plane perpendicular to the light incident surface and the light exit surface is 30 to 60% of the half width 値 B. The half width 値 A of the distribution of the light emitted from the light exit surface of the light deflection element in the plane perpendicular to the light incident surface and the light exit surface is 30 to 50% of the half width 値 B. The half-width 値 A of the light emitted from the light-emitting surface of the light-deflecting element perpendicular to the light-incident surface and the surface of the light-emitting surface is 25 degrees or less. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed on the light entrance surface to form a plurality of queues arranged side by side, each of which has two queues; when a plurality of imaginary queues are Arranged at the same pitch as the array pitch of the light deflection elements, and the apex angle Θ is 50 ~ 70, then the light planes on the far side from the primary light source make the light from the light guide In the light distribution of the light emitted from the light exit surface of the body, the peak emission light is incident from one of the planes, and is totally reflected by the inner surface on the other plane, and then from the light exit surface to the desired Shoot out in a direction; according to the imaginary queue, at least one of the planes is made into a convex curved shape. The queues have a common bottom with the imaginary queues, the convex curved surface shape is a slightly convex cylindrical surface shape, and the radius of curvature r is normalized by the array pitch P of the queues ( r / p) is 2 to 80. The 13 paper sizes of the convexly curved shapes of the queues of the light deflection element are in accordance with the Chinese National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 Employees ’Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Print 8622pif * doc / 008 Description of the invention (l) The ratio (d / p) of the maximum distance d between the planes and the hypothetical queues δ and the arrangement pitch P of the queues is 0. . 05 ~ 5%. In the imaginary prism arrays, the inclination angles of the planes near the primary light source side are 45 degrees or more. The sections of these imaginary queues are isosceles triangles. The light exit surface of the light guide body and / or the opposite back surface thereof has a directional light exit function surface. The average inclination angle of the directional light emitting functional surface is 0.5 to 15. . The directional light emitting function surface is a rough surface or a surface formed by a plurality of lens rows. _ In order to make the above principles and other purposes, features, and advantages of the present invention clearer and easier to understand, the following is a detailed description of the preferred embodiment and the accompanying ® formula: A schematic perspective view of a surface light source device according to the present invention. FIG. 2 is an explanatory diagram of a queue shape of a light incident surface of a light deflection element. FIG. Fig. 3 is a schematic body view showing a surface light source device according to the present invention. Description of drawing submission: 1 primary light source 2 light source reflector 3 light guide 4 light deflecting element 5 light reflecting element 6 light-shielding material 14 This paper size applies to China National Standard (CNS) A4 (210 X 297 male) Meal) --------------------- Order --------- Line {(Please read the notes on the back before filling this page) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention (p) 31 light incidence surface 32 pair light incidence surface 31 opposite side end surface 33 light exit surface 34 light exit surface 33 back surface 41 light entrance surface 42 light exit surface I Imaginary 稜鏡 I-1 , 1-2 The angle between the peak direction of the light emitting cloth of the hypothetical plane a and the light exit plane 33, (inclination angle α) Θ The pitch of the top angle P of the hypothetical plane is more DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a surface light source device according to an embodiment of the present invention. As shown in FIG. 1, the surface light source device of the present invention is composed of a light guide 3, a primary light source 1, a light deflecting element 4, and a light reflecting element 5. In the light guide 3, at least one end surface is used as the light incident surface 31, and a surface slightly perpendicular thereto is used as the light exit surface 33. The primary light source 1 is arranged on the light incident surface 31 of the surface guide 3 and is covered with the light source reflector 2. The light deflecting element 4 is arranged on a light emitting surface of the light guide 3. The light reflecting element 5 is disposed on the rear surface 34 of the light exit surface 33 of the light guide 3. The light guide 3 is arranged parallel to the XY plane and has a rectangular plate shape as a whole. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) -------------------- Order --------- line (Please read the notes on the back before filling out this page) Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 594279 Λ7 B7 Five Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 8622pif. doc / 008 Description of the invention (h) The light guide 3 has four side end surfaces, and at least one end surface of the pair of side end surfaces parallel to the γζ plane is used as the light incident surface 31. The light incident surface 31 is disposed facing the light source 1, and light emitted from the light source 1 is incident from the light incident surface 31 into the light guide body 3. According to the present invention, a light source may be disposed at another side end surface such as a side end surface 32 opposite to the light incident surface 31. The two principal surfaces of the light guide 3 which are approximately perpendicular to the light incident surface 31 are respectively substantially parallel to the XY plane, and any one of the surfaces (the upper part in the figure) can be used as the light exit surface 33. On at least one of the light emitting surface 33 or the back surface 34, a directional light emitting function section is disposed. This directional light emission function section may be composed of a rough surface, or a plurality of lens rows such as a ridge line, a lenticular lens line 'V-shaped groove, and the like, may be substantially parallel and juxtaposed with the light incident surface 31. A lens surface is formed, and a directional light emission function section is formed from the lens surface. Thereby, the light incident from the light incident surface 31 is guided in one side of the light guide body 3, and in a plane (XZ plane) perpendicular to the light incident surface 31 and the light exit surface 33 from the light exit surface 33. In the emitted light distribution, light having directivity is emitted. The angle formed by the peak 値 direction of the outgoing light distribution distributed in the XZ plane and the light exit surface 33 is α. The angle α is preferably 10 to 40 degrees, and the half width 値 of the emitted light distribution is preferably 10 to 40 degrees. The rough surface or lens array formed on the surface of the light guide 3 sets the average inclination angle 0a set by IS04287 / 1-1984 to 0. In a range of 5 to 15 °, the brightness of the light exit surface 33 is increased. The average tilt angle θα is preferably in the range of 1 to 12 °, and more preferably 1. 5 ~ 11 16 --------- 丨 丨 -------- 丨 Order --- I ----- line (Please read the precautions on the back before filling this page) This paper size Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 594279 Five _I___ Printed Invention Note (#) by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Range. Preferably, the average inclination angle ea is set to the optimum range by the ratio 値 (L / t) of the thickness ⑴ of the light guide 3 and the length (L) in the propagation direction of the incident light. That is, when using the light guide 3 with a ratio 値 (L / t) of about 20 to 200, the preferred range of average tilt angle 0a is 0. 5 ~ 7. 5 °, more preferably in the range of 1 ~ 5 °, and most preferably in the range of L5 ~ 4 °. In addition, when the light guide 3 having a ratio 値 (L / t) of about 20 or less is used, a preferred average inclination angle θα ranges from 7 to 12 °, and more preferably 8 to 11. In the range. The average inclination angle 0a of the rough surface formed on the light guide 3 is based on IS04287 / 1-1984, and the shape of the rough surface is measured by a stylus surface roughness meter. The coordinate of the measurement direction is X, and the obtained tilt function f (x) can be obtained by the following formulas (1) and (2). Here, L is a measurement length, and is a tangent of an average inclination angle 0a. Δ a = (l / L) $ 0Ld / DX) f (x) dx. . . . . . . . . . . . (1) 0a = tan_1 (△ a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (2) Furthermore, preferably, the light emission rate of the light guide 3 is 0. In the range of 5 to 5%, more preferably in the range of 1 to 3%. This is because when the light output is less than 0. At 5%, the amount of light emitted from the light guide 3 becomes small, and there is a tendency that sufficient brightness cannot be obtained; when the light emission rate is greater than 5%, a large amount of light is emitted near the light source 1, so that the light exit surface 33 The light in the X direction is obviously attenuated, resulting in a tendency that the uniformity and uniformity of the brightness on the light exit surface 33 tends to decrease. As described above, by letting the light emission rate of the light guide 3 be 0. 5 ~ 5% and the angle α of the peak light of the light distribution of the light emitted from the light exit surface is in the range of 10 ~ 40 °, so that on the XZ plane perpendicular to both the light incident surface and the light exit surface, The half-width paper size of the outgoing light distribution is in accordance with China National Standard (CNS) A4 (210 X 297 mm) -------------------- Order ---- ----- Line (Please read the precautions on the back before filling this page) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention (値 becomes 10 ~ 40 °. Based on this, you can make the light with high directivity (please read the precautions on the back before filling this page). The light is emitted, and its direction can be effectively deflected by the light deflection element 4, and a surface light source element with high brightness can be provided. In the present invention, the light emission rate of the light guide 3 can be in the following manner It is assumed that the light intensity of the light emitted from the edge of the light exit surface 33 near the light incident surface 31 side is I. The light intensity from the end edge of the light incident surface 31 at the distance L is I, and the light guide body When the thickness of 4 (the dimension in the Z direction) is t, the relationship of the following formula (3) is satisfied: 1 = 1. a (la) L / t ". . . . . . . . . . . . . . . . (3) Here, the constant α is the light emission rate, which refers to the length per unit length (the length corresponding to the thickness t of the light guide) of the light exit surface 33 perpendicular to the light incidence surface 31 in the X direction. The ratio (%) of the light emitted from the light body 3. This light emission rate α can be obtained from the slope of the logarithm of the light intensity log of the light emitted from the light exit surface 33 and the horizontal axis (L / t) on the vertical axis. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In addition, in order to control the directivity of the light emitted from the light guide 3 on the plane (YZ plane) parallel to the light source 1, it is possible to emit light without directional light A lens surface is formed on the other main surface of the functional part. This lens surface is formed by arranging a plurality of lens rows along a direction (X direction) approximately perpendicular to the incident surface 31. In the embodiment shown in FIG. 1, a rough surface is formed on the light emitting surface 33, and a lens surface formed by a plurality of lens rows is formed on the back surface 34, and the lens rows are approximately perpendicular to the light incident surface along 31 direction (X direction). In addition, the present invention can also be used with the paper size shown in Figure 1. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 8622pif. doc / 008 -------- B7 _____-___ 5. Explanation of the Invention (b) On the contrary, the lens surface is formed on the light exit surface 33, and the rough surface is formed on the back surface 34. (Please read the precautions on the back before filling in this page.) As shown in Figure 1, when the lens row is formed on the back 34 or the light exit surface 33 of the light guide 3, the lens row may be a rib extending approximately along the X direction. Mirror rows, lenticular lens rows, V-shaped grooves, etc. However, in the YZ direction, it is preferable to have a queue having a substantially triangular cross-sectional shape. In the present invention, when the lens array formed on the light guide 3 is formed in a 稜鏡 array, it is preferable that the apex angle thereof is in the range of 70 to 150 °. This is because when the apex angle is within this range, the light emitted from the light guide 3 can be sufficiently concentrated, and the brightness of the surface light source element can be further improved. That is, by letting the apex angle within this range, including the peak chirped light of the outgoing light distribution, on a plane perpendicular to the XZ plane, the outgoing light with a half width 値 of the outgoing light distribution of 35 to 65 ° is concentrated Emission, so the brightness of the surface light source element can be improved. In addition, when a queuing is formed on the light exit surface 33, the apex angle is preferably in a range of 80 to 100 °. When the queue is formed on the back surface 34, the apex angle is 70 to 80 °. Or a range of 100 to 150 ° is suitable. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the present invention can also mix and disperse light diffusing particles inside the light guide to give a directional light emission function, which can replace the light emission surface 33 or the back surface 34 described above. The light emitting function part formed above is used together with the light emitting function part. The light guide 3 is not limited to the shape 5 shown in FIG. 1. Various shapes such as a wedge shape and a boat shape may be used. The light deflecting element 4 is arranged on the light exit surface 33 of the light guide 3. The two principal faces 41, 42 of the light deflecting element 4 face each other, and the entire principal faces are located at positions parallel to the XY plane, respectively. Main surface 41, 42 19 This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 8622pif. doc / 008 V. One surface of the invention description (for example, the main surface on the light exit surface 33 side of the light guide body) is used as the light entrance surface 41, and the other surface is used as the light exit surface 42. The light exit surface 42 is a flat surface parallel to the light exit surface 33 of the light guide 3. The light incident surface 41 is a ridge surface formed by a plurality of ridges extending in the Y direction and arranged in parallel with each other. It is also possible to arrange a flat portion with a relatively narrow width between adjacent rows (for example, a flat portion having a width substantially equal to or smaller than the pitch of the row). From the viewpoint, it is preferable that the flat portions are not arranged, and it is preferable to form the ridges continuously. FIG. 2 is a diagram illustrating the shape of the array on the light incident surface 41 of the light deflecting element 4. The shape of the queues on the light incident surface 41 is set in the following manner. That is, the pitch of the arrangement of the queues is P. First, it is assumed that the cross section of the imaginary prism row I is triangular. The angle formed by the two planes 1-1, 1-2 of the imaginary queue I (that is, the imaginary apex angle) is θ. The imaginary apex angle Θ is set in such a manner that the light emitted from the light exit surface 33 of the light guide 3 has an intensity distribution in the intensity distribution in the XZ plane. ) Is incident on the virtual queue I, and after the virtual plane 1-2 is totally reflected by the inner surface, it can travel toward, for example, the normal direction of the light emitting surface 42. For example, if the light emitted from the light-emitting surface 42 of the light deflection element 4 is near the normal of the light-emitting surface 42 (for example, within a range of ± 10 degrees in the direction of the normal), the imaginary peak is assumed. The angle Θ is preferably 50 to 70 degrees, more preferably 55 to 70 degrees, and most preferably 60 to 70 degrees. In addition, from the viewpoint that the light emitted from the light guide 3 can be efficiently deflected by the light deflection element 4 to the expected direction, the false 20 paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) --------------- 丨 丨!丨 Order --- I ----- (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention (A) The inclination angle (relative to the angle formed by the light emitting surface 42) of one of the planes I want to queue I is preferably 45 degrees or more, and more preferably 47 degrees or more It is better to be above 50 degrees. Next, based on the shape of the imaginary queue set above, the actual shape of the frame is set such that at least one of the surfaces is a convex curved shape. Preferably, the shape of the actual queue can be set as described below. Set an imaginary light so that the light emitted from the light exit surface 33 of the light guide 3 will have the peak of the outgoing light distribution (the inclination angle can be swept over the top of the adjacent imaginary queue on the light source 1 side and incident) To the virtual plane I. The position where the virtual light passes through the virtual plane 1-1 is K1, and the position where the virtual light reaches the virtual plane 1-2 is K2. Generally speaking, from the position K2, the entire plane near the light emitting surface 42 is the most It is designed to be convexly curved. On the other hand, from the total reflection position K2 of the inner surface 1-2 of the imaginary queue I, the position close to the light incident surface 41 (that is, the position far from the light exit surface 42) may be Designed as a flat shape or a convex curved surface shape. In either case, it is preferable to extend the shape of the plane near position K2 near the light emitting surface 42. The top of the queue may also be inconsistent with the top of the virtual queue. The shape of the queue is closer to the light exit surface 42 than the total reflection position K2 of the inner surface of the virtual queue 1-2. The inclination of at least a part or all of the queue is larger than that of the virtual queue. Column 1-2 The shape of the convex curved surface with a large inclination angle is preferable. The dimension ζ (the distance in the Z direction between the apex of the train line and the total reflection position K2 of the inner surface of the virtual plane ι-2) is shown in the following formula: According to the 21 paper standards, the Chinese National Standard (CNS) A4 size 10 x 297 meals are available. --Line (please read the notes on the back before filling this page) Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 594279 Λ7 B7 8622pif〇doc / 008 5. The Z direction position on the invention description (β): (please first Read the notes on the back and fill out this page) Z = {(P · tan ae cot [0/2] / (tan a + cot [0/2])} ° cot [6/2] + {cot6 / (cot [0/2] -cot0)}] The actual pseudo-plane has an inclination angle greater than the pseudo-plane 1-2 of the hypothetical queue I represented by the following formula (where η is the refractive index of the queue). Ncos [30/2] = Sin (α-[Θ / 2]) By setting the printed queue shape of the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the light entrance 41 to the above-mentioned shape, the light can be deflected The distribution angle (half-width chirp) of the light emitted by element 4 becomes smaller. That is, the light reaching a position closer to the light emitting surface 42 than the total internal reflection position K2 of the inner surface 1-2 of the virtual queue I is more than the top of the adjacent virtual queue on the primary light source side. The set of light rays incident on the lower side and at an inclination angle larger than the inclination angle α. Therefore, the direction of the distribution peak 値 is an inclination direction larger than the inclination angle α. The distribution peak 値 direction of the total reflection light on its inner surface , Is a direction inclined from the normal direction of the light emitting surface 42 to the direction of the imaginary plane of total reflection of the inner surface. Therefore, in order to concentrate the amount of emitted light in a specific direction, at least a part of the actual edge is closer to the light-emitting surface 42 than the total reflection position K2 of the inner surface of the 稜鏡 plane 1-2 of the virtual queue I The inclination angle of the plane of the mirror row is larger than the tilt angle of the corresponding virtual plane. Therefore, in this area, the direction of the light that is totally reflected on the actual inner surface can be corrected compared to the reflected light from the hypothetical plane, so that it moves more toward the normal direction of the light exit surface 42. This achieves high brightness and narrow field of view. The convex curved shape as described above is formed at a position closer to the light emitting surface 42 than the total reflection position K2 of the inner surface of the imaginary surface of the imaginary queue I. 22 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 Λ7 B7 8622pj_f.  doc / 008 5. Description of the invention ο) The entire surface; at a position farther from the light-emitting surface 42 than the internal total reflection position K2, the surface can directly use the shape of the virtual surface 1-2. In addition, including the position farther from the light emitting surface 42 than the total reflection position K2 of the inner surface, the entire surface can be designed into a convex curved shape. For example, such a convex curved surface shape may be a convex cylindrical surface shape having at least a common bottom with an imaginary queue and a radius of curvature r. Here, the ratio of the radius of curvature r normalized by pitch (pitch) P (r / p) is preferably in the range of 2 to 80, preferably in the range of 7 to 30, and more preferably 7. The range is 5 to 20, and the best range is 8 to 15. This is because when the ratio 値 r / p is set within this range, the half width 値 of the distribution of the light emitted from the light-emitting surface 42 of the light deflection element 4 can be sufficiently narrowed, so that the brightness of the light source device can be sufficiently improved. For example, when the distance between queues is 40 to 60 // m, the radius of curvature r is preferably in the range of 25 0 to 3 00 / zm, more preferably 350 to 1000 // m, and more preferably 350 to 700. // range of m. In addition, it is preferable that the maximum distance d between the imaginary ridge plane and the convex curved surface ridge plane and the ratio 以及 (d / P) of the arrangement pitch P of the above ridge train are 0. The range is from 05 to 5%, and it has a relatively gentle curved shape to design the convex curved shape of each queue of light deflection elements 4. Preferably 0. The range of 1 ~ 3%, more preferably 0. The range of 2 ~ 2%, the best is 0. 7 ~ 1. 5% range. When d / P exceeds 5%, the light-collecting effect of the light deflection element 4 is impaired, and light tends to diverge. Therefore, the half width 分布 of the distribution of the light emitted from the light exit surface 42 of the light deflection element 4 tends to be insufficiently narrowed. In contrast, when d / P is less than 0. At 05%, the light collecting effect of the light deflection element 4 is insufficient. Therefore, from the light 23 ------------ · 丨!丨! Order --- I --- I (Please read the notes on the back before filling this page) Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) A4 (210 X 297 mm) ) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention (y) Half of the distribution of the light emitted from the light-emitting surface 42 of the deflection element 4 will tend to be insufficiently narrowed. Further, in the present invention, the convex curved surface shape of each queuing of the light deflecting element 4 is not limited to the arc-shaped shape in the cross section of the radius of curvature r as described above. Within the above-mentioned range of d / p, it may be an aspheric convex curved surface. In the present invention, it is preferable that the convex surface having the convex curved shape as described above is formed at least on the surface remote from the primary light source 1 side. Accordingly, when the primary light source is also arranged on the end surface 32 of the light guide 3, the distribution angle of the light emitted from the light deflection element 4 can be sufficiently reduced. In addition, if the ratio of the light propagating through the light guide 3 is reflected back by the end surface 32 opposite to the light incident surface 31, the convex surface having a convex curved surface may be formed on the convex surface near the primary light source side. The prism surface near the primary light source side can use the normal direction of the light emitting surface 42 as the axis of symmetry, and be symmetrical with the actual planes corresponding to the virtual planes 1-2. On the other hand, when the ratio of the light propagating through the light guide 3 to the end surface 32 opposite to the light incident surface 31 is relatively low, the flat surface near the primary light source 1 side can also be made flat. In addition, when the light deflection element 4 is mounted on the light guide 3, in order to suppress the sticking phenomenon, and the top of the plutonium needs to be sharpened (formally formed on the front edge), it will approach the primary light source 1 The plane of Tori J is made flat; compared with the case where both planes are convex, the top of the train is formed based on the reason that the shape of the transfer surface of the forming member forming the train can be formed more accurately. It is preferable to form it sharp. 24 -------------------- 订 --------- 线 # (Please read the notes on the back before filling this page) Intellectual Property of the Ministry of Economic Affairs The paper size printed by the Bureau ’s Consumer Cooperatives applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention (y) According to the light deflecting element of the present invention, in order to accurately produce the desired shape of the chirp to obtain stable and stable optical performance, and in order to prevent the assembly operation or the use of a surface light source device , Which causes wear or deformation at the top of the salamander, a flat part or a curved part may be formed at the top of the salamander. At this time, from the viewpoint of suppressing the decrease in the brightness of the surface light source device or suppressing the uneven brightness pattern caused by the adsorption phenomenon, the preferable width of the flat portion or the curved surface portion formed at the top of the cymbal is 3 // m or less. , More preferably 2 // m or less, and most preferably 1 // m or less. In addition, according to the present invention, the quality can be improved by adjusting the field angle of the surface light source device, a light diffusion layer can be formed on the light exit side of the light deflection element, and a light diffusing agent can be added to the prism array. The light diffusing layer can be provided with a light diffusing sheet on the light emitting surface of the light deflecting element, or it can be used on the light emitting surface side to form a light diffusing layer integrally with the light deflecting element. At this time, as long as the brightness enhancement effect of narrowing the field of view by the light deflection element is not prevented, a non-isotropically diffusive light diffusion layer can be formed to diffuse the light in a desired direction. As the light diffusing agent dispersed in the queue, transparent fine particles having a refractive index different from that of the queue can be used. -At this time, the content, particle size, refractive index, and the like of the light diffusing agent are selected so long as they do not hinder the brightness enhancement effect of narrowing the field of view by the light deflection element. As described above, by arranging the above-mentioned light deflection element 4 on the light exit surface 33 of the light guide 3 such that the queuing surface becomes the light incident surface side, and the light exit surface 33 is emitted from the light guide 3 Among the directional outgoing light, the outgoing light distribution in the XZ plane can be narrower. This makes it possible to increase the brightness of the light source device and narrow the field of view. 25 out of the above-mentioned light deflection element 4 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) --------------------- Order --------- line (Please read the notes on the back before filling out this page) Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 594279 8622pif, doc / 〇 〇8 V. Description of the invention () In light, the half of the distribution of the outgoing light in the XZ plane is preferably in the range of 5 to 25 degrees, preferably in the range of 10 to 20 degrees, and more preferably 12 to 18 degrees. range. On the other hand, by setting the half-width 出 of the emitted light distribution to 5 degrees or more, it is possible to eliminate the difficulty of portraits and the like caused by an extremely narrow field of view. Below 25 degrees, it is possible to increase brightness and change the field of view. narrow. Since the narrow field of view of the light deflection element 4 of the present invention is affected by the extent (half width) of the light distribution (in the XZ plane) from the light exit surface 33 of the light guide 3, the light deflection element is deflected from the light The ratio of the half-width 値 A of the light distribution from the light-emitting surface 42 of 4 to the half-width 値 B of the light-distribution from the light-emitting surface 33 of the light guide 3 will follow the distribution of the light from the light-guide 3値 B changes by half. For example, when the half-width 値 B of the light emitted from the light guide 3 is less than 26 degrees, the half-width 値 A is preferably in the range of 30 to 95% of the half-width 値 B, more preferably 30 to 80%, and more preferably The range is 30 to 70%. In addition, when the half-width 値 B of the light distribution from the light guide 3 is 26 degrees or more, the half-width 値 A is preferably in the range of 30 to 80%, and more preferably in the range of 30 to 70%. It is preferably in the range of 30 to 60%. Especially when the half-width 値 B of the light distribution from the light guide 3 is 26 to 36 degrees, the half-width 最好 A is preferably in the range of 30 to 80%, and more preferably 30 to 70% of the half-width 値 B. A more preferable range is 30 to 60%. Moreover, when the half-width 値 B of the light emitted from the light guide 3 exceeds 36 degrees, the half-width 値 A is preferably in the range of 30 to 70%, and more preferably in the range of 30 to 60% of the half-width 値 B. It is preferably in the range of 30 to 50%. According to the present invention, since the half width of the light distribution from the light guide 3 is larger, its 26 paper sizes are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ---------- ----------- Order --------- Line '(Please read the notes on the back before filling this page) 594279 Five Λ7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 8622pif „doc / 008 Description of the invention (] €) The effect of narrow field of view is also greater, so from the viewpoint of narrow field of view efficiency, the light guide with half the width of the outgoing light distribution 分布 B is 26 degrees or more and the light is deflected It is better to use the components together, and it is more preferable to use a light guide with a half-width 値 B exceeding 36 degrees. In addition, when the half-width 分布 of the light distribution from the light guide 3 is small, the effect of narrowing the field of vision becomes small. However Since the half width 値 of the light distribution of the light guide 3 is smaller, the brightness can be improved. Therefore, from the viewpoint of improving the brightness, the light guide and the light deflection element whose half width 出 B of the light distribution is less than 26 degrees. It is better to use together. Primary light source (PRIMARY LIGHT S0URCE) 1 is a line extending in the Y direction Light source. The primary light source 1 can be, for example, a fluorescent lamp or a cold cathode tube. In addition, according to the present invention, the primary light source 1 is not limited to a linear light source, and a light emitting diode (LED) light source, a halogen lamp (halogen) can also be used. point light source such as lamp), metal halide lamp, etc. Especially when it is used in display devices with small screen size such as mobile phones or portable information terminals, it is better to use small point light sources such as LEDs. The primary light source 1 ′ is not only provided on one end surface of the light guide 3 as shown in FIG. 1, but can also be arranged on the opposite end surface if necessary. The light source reflector 2 is used to reduce the primary light source. 1 light loss, and the light guide is guided to the light body 3. The material can be, for example, a plastic film with a reflective reflection layer on the surface. As shown in the figure, the light source reflector 2 is from the edge of the light reflection element 5 Outside the light source, the light source 1 is turned to the light exit surface _ edge of the element 4 through the outside of the primary light source 1. In addition, '27 ------------------- order --- ------ 线 # (Please read the notes on the back before filling this page ) This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 Λ7 B7 8622pifcd〇c / 008 5. Description of the invention (#) The light source reflector 2 can also be from the edge of the light reflecting element 5 Outside, it is rolled to the edge of the light exit surface of the light guide 3 through the outside of the primary light source 1. The same reflecting member as the light source reflector 2 may be disposed on a side end other than the side end 31 of the light guide 3. . For example, the light reflecting element 5 may be a plastic sheet having a metal-evaporated reflective layer on its surface. According to the present invention, the light reflecting element 5 may be replaced by a reflective thin plate, which is formed on the inner surface 34 of the light guide body 3 by a metal vapor deposition method. The light guide 3 and the light deflecting element 4 of the present invention may be made of a synthetic resin having a high light transmittance. For example, such a synthetic resin may be a methacrylate resin, an acrylic resin, a polycarbonate resin, a polyester resin, or a vinyl chloride resin. (Vinyl chloride resin). In particular, methacrylate resins are the most suitable because they have excellent light transmittance, heat resistance, mechanical properties, and moldability. This methacrylate resin is a resin containing methyl methacrylate as a main component, and preferably contains 80% by weight or more of methyl methacrylate. When forming the surface structure of the rough surface of the light guide 3 and the light deflecting element 4 or the surface structure of the queue, a model member having a desired surface structure may be used, and the transparent synthetic resin plate may be pressed by hot pressing. ) Method to form. Alternatively, the shape of the surface structure can be made while forming by screen printing, extrusion molding, or injection molding. . In addition, it can also use heat or light. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm). ------- 线 # (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employee Cooperatives of the Ministry of Economics and Intellectual Property Bureau Printed by the Consumer Cooperatives 594279 The resin or the like forms a structural surface. Furthermore, polyester resin, acrylic resin, polycarbonate resin, vinyl chloride resin, and polymethacrylimide resin are used. (P〇iymethacrylimide) and other transparent substrates such as films or sheets can also be formed on the surface of the rough surface structure or lens array structure made of active energy hardening resin . Such a thin plate can be integrally bonded to another transparent base material by a method such as bonding or welding. Active energy ray-curable resins can use polyfunctional (meth) acrylic compounds, vinyl compounds, (metha) acrylate esters, allyl compounds, (formaldehyde) Base) Metals such as (metha) acrylic acid. The light source surface (light-emitting surface 42 of the light deflecting element 4) of the surface light source device formed by the primary light source 1, light source reflector 2, light guide 3, light deflecting element 4, and light reflecting element 5 is arranged A liquid crystal display element to constitute a liquid crystal display device. The liquid crystal display device is observed by an observer through the liquid crystal display element from the top of FIG. 1. In addition, according to the present invention, since a very narrow distribution of light can be incident from a surface light source device to the liquid crystal display element, There is no phenomenon such as tone inversion, so a bright and homogeneous hue display image can be obtained. At the same time, concentrated light irradiation can be obtained in a desired direction, so it is possible to improve the utilization efficiency of the amount of light emitted by the primary light source in this direction. FIG. 3 shows another embodiment of the surface light source device according to the present invention. 29 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -------------- ------ Order --------- line (Please read the note on the back? Matters before filling out this page) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention GO) /: A perspective view. In this embodiment, the back surface 34 of the light guide 3 is a flat surface, and the thickness from the light incident end surface 31 toward the end surface on the opposite side gradually decreases and becomes wedge-shaped. A light-shielding material 6 for preventing bright lines or dark lines is arranged near the primary light source 丨. The above is different from the embodiment illustrated in Figs. In addition, the above embodiments are described with respect to a surface light source device. The present invention can also be applied to a Y-shaped size light source device that is, for example, 5 times or less the thickness of the light guide 3 and an elongated rod-shaped light source device in the X direction. In this case, a slightly point light source such as an LED can be used as the primary light source. — Next, the present invention will be specifically described with examples. In the following examples, various physical properties were measured by the following methods. The normal brightness and luminosity of the toe light source element are measured in half width. The light source is a cold cathode tube, an inverter (Harrison company HIV-742A) is applied with DC12V, and the lamp is lit at a high frequency. The surface of the surface light source device or light guide is divided into 3x5 squares of 20mm square to obtain the brightness in the normal direction of each square, and then the 15 brightness points are averaged to obtain the brightness. The measurement of the luminosity half width is based on the black paper with a pin hole of 4mm 0 fixed on the surface of the surface light source device or the light guide body so that the pin hole is in the center of the surface and adjusted. The distance is such that the measuring circle of the luminance meter is 8 to 9 mm; In the direction of the cold cathode tube which is perpendicular to and parallel to the longitudinal axis, the pin hole is used as the center to adjust the rotation angle of the gonio axis . In all directions, keep the axis of rotation at +80. Between ~ -80 ° to 〇. One side turns at 5 ° intervals, and the other side is measured with a luminometer to measure the light distribution of the emitted light, so as to obtain the normal side. This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) ------- ----- Clothing ------ 丨 Ordering ----------- Line C, please read the precautions on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employee Cooperatives 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention) The brightness and luminosity distribution in the direction of half width 値 (the amplitude angle of the I / 2 distribution of the peak 値 値). The macro measurement of the average inclination angle (ea) is IS04287 / 1-1987. The stylus type is a stylus type surface roughness meter (010-2528 (1 μmR, 55 ° cone, diamond)) (SUFCOM570A manufactured by Tokyo Seiki Co., Ltd.) To drive speed 〇. The surface roughness of the rough surface was measured at 0 mm / sec, and the average line was subtracted from the chart obtained from the measurement, and the slope was corrected, and calculated from the above formulas (1) and (2). Example 1 An acrylic resin (ACRYPADVH5 # 000 from Mitsubishi Rayon Co., Ltd.) was formed by injection molding to make one surface rough (average tilt angle 3. 0 degrees) of the light guide plate. The light guide plate is a wedge-shaped plate with a thickness of 195mmx2 5 3mm. The mirror side of the light guide is parallel to the side (short side) of the light guide with a length of 195 mm, and an acrylic ultraviolet curing resin is used to form a hafnium layer. This layer is composed of a series of columns arranged side by side, and the top angle of each column is 14 °. And the pitch is 50 / zm. The light source reflector (silver reflective film made by Liguang Co., Ltd.) is arranged along the long side on one end face (the end face on the side of 3 mm thick) of the side (long side) corresponding to the light guide body with a length of 253 mm to cover the cold side. Cathode tube. In addition, a light-diffusing reflective film (E60 manufactured by Toray Industries) was attached to the other side end faces, and reflection sheets were arranged in a line (back side). Next, the above configuration is combined into a frame. The light guide has a light emission rate of 1. 5%. With respect to the normal direction of the light exit surface, the maximum peak value of the photometric distribution of the outgoing light is 70 degrees, and the half-width (half-width 値 B) is 24. 5 degrees. -------------------- Order --------- line # (Please read the notes on the back before filling this page) Intellectual Property Bureau of the Ministry of Economic Affairs The paper size printed by the employee consumer cooperative is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 594279 Λ7 B7 8622pif. doc / 008 V. Description of the invention) (Please read the precautions on the back before filling out this page) On the other hand, using an acrylic UV-curable resin with a refractive index of 1.5064, The entire surface is formed into a convex curved shape with a radius of curvature shown in Table 1, and a plurality of queues are continuously arranged side by side at a pitch of 50 // m to form a queue. Thereafter, this queue formation surface was arranged on one of the surfaces of a polyester film having a thickness of 50 // m to prepare a cymbal sheet. At this time, the imaginary queue is a queue of isosceles triangles in cross section, and is set to have a distance of 50 // m and 65. An apex angle of 4 degrees, so that the light emitted from the sepal can be emitted along the normal direction of the light exit surface. Each of the cymbals obtained above was formed into a cymbal formation surface on the light exit surface side of the light guide body so that the ridge line of the ridge line was parallel to the light incidence surface of the light guide body. Next, a surface light source device was fabricated with the above-mentioned configuration, and the intensity ratio of the peak brightness of the surface light source device and the half-width 値 (half-width 値 A) of the light emission distribution perpendicular to the inner surface of the cold cathode tube were obtained. The results are shown in Table 1. Comparative Example 1 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs except that the front surface of the queue forming the thin sheet is flat, the rest is the same as in the embodiment, with a distance of 50 // m and a vertex angle of 65.4 degrees. A line of isosceles triangles is formed on one surface to make a thin plate. This cymbal is placed so that the queuing line faces the light exit surface side of the light guide obtained in Example 1, and the ridge line is parallel to the light incident surface of the light guide. Next, the intensity ratio of the peak 値 brightness of the surface light source device manufactured as described above and the half-width 値 (half-width 値 A) perpendicular to the light distribution in the inner surface of the cold cathode tube were obtained. The results are shown in Table 1. 32 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 Λ7 _B7 V. Description of the invention) I Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by the Consumers' Cooperative of China. It is called Tdc \ lc \] 98 ί Ϊ m 00 o ο Ό ο < N Ό < N Ό m inch 卜 卜 α \ οο inch ο r-H r—Η < 1Μ £ 卜 m ο < Ν ο cn inch 00 bu inch < Ν ΟΟ inch 00 inch oo Os inch On o Ό < N in inch inch inch in 00 ιπ (Ν 卜 00 Ο (Ν (Ν Ο m (Ν Ο Ο 卜 (Ν < ηί Fen 〇 r · —Η m m r—H inch inch r—Η inch r—Η inch inch, 丨 丨 ι inch inch f < inch inch r-H < N inch f read o inch ▼-«Η Ο inch, 丨 Η 00 ΓΠ ▼ —Η cn m α \ 'f < Bu ο in inch Ο rH Ο Ο Oh \ inch (N m inch Ό (Ν rH ^ -Η m rH rH (N ▼ -H 〇〇 \ o cn o ON 00 ο 00 ο 1—Η ο ο m Inch ο (Ν (Ν Ο 00 rH ο Inch rH ο Ο Ο Ο S S rH rH 5 > 〇 卜 〇 cn ο 〇 \ ιη ο VO IT) o Inch 〇〇ON Inch o Inch ο m Inch ο m Inch ο m ο (Ν (Ν Ο < 1 Ί Ο ΟΝ ο ο ο ο Ο Ο Ο Qh Ο Ο in 〇 卜 ο ο οο ο 00 ο ο o C \ ooor—i 〇to o -j ", o TH ο ο (Ν rH ο ( Ν τ-Ή ο ο ▼ Ν Η Ο Ο ^ Γ) (Ν Ο Ο ο ο ο ο ο ο ο 00 1 ffl S IH 陌 魃 ε ο < Ν 卜 cn ο ο inch ιη (Ν inch ο inch m bull inch o o to < N o in 卜 Ο ο Ό ιη < Ν ο 卜 (Ν ο ο (Ν ο ο ο m ο ο ο inch) Β < CO υ Q ω PtH O ffi h— (Η-1 〇 〇Η α 1 Series IK 镒 λλ --------------------- Order ---- ----- Line * (Please read the notes on the back before filling out this page) ern Μ This paper size applies to China National Standard (CNS) A4 (210 χ 297 mm) 594279 8622p.if.d〇c / 0〇8 Λ7 B7 V. Use acrylic resin (Mitsubishi Rayon (please read the precautions on the back before filling in this page) ACRYPADVH5 # 000) by injection molding to make one surface rough ( mat) (average tilt angle 8. 0 degrees) light guide plate. The light guide plate is a wedge-shaped plate with a thickness of 195mm x 253mm. The mirror side of the light guide is parallel to the side (short side) of the light guide with a length of 195mm, Acrylic UV-curing resin is used to form a concrete layer. This concrete layer is composed of a series of columns arranged side by side, each column having a vertex angle of 140 ° and a pitch of 50 // m. Surface The light source reflector (silver reflective film made by Liguang Co., Ltd.) is oriented along the long side of one end face (the end face on the side of 3 mm thick) corresponding to the side (long side) of the light guide with a length of 253 mm. It is arranged so as to cover the cold cathode tube. In addition, the other side end faces are pasted with a light diffusion reflective film (E60 manufactured by Toray Corporation), and reflection sheets are arranged in a queue (back side). Next, the above configuration is combined Into the frame. The light emission rate of this light guide is 4.5%. The maximum peak value of the luminous intensity distribution of the emitted light relative to the normal direction of the light exit surface is 61 degrees, and the half width (half width B) is 39 degrees. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. On the other hand, an acrylic ultraviolet curable resin with a refractive index of 1.5064 was used to envelop the entire surface of both sides with a radius of curvature as shown in Table 2. The shape of the curved surface, and a plurality of rows are arranged side by side at a pitch of 50 // m, and are continuously arranged in parallel to form a row. Then, the row is formed on a polyester film having a thickness of 50 // m. One of the surfaces is used to make a cymbal. At this time, the imaginary queuing is a queuing of an isosceles triangle in cross section, and is set to have a pitch of 50 // m and an apex angle of 65.4 degrees, so as to make the edge The light emitted by the lens can follow the 34 paper The scale applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 594279 8622pif.doc / 008 V. Paste in the winning direction. Each of the ridges obtained above is guided to the edges on the light exit side of the light body The mirror formation surface is such that the ridge line of the queue is parallel to the light incident surface of the light guide. Next, a surface light source device is manufactured with the above-mentioned structure, and the intensity ratio of the peak and brightness of the surface light source device and the perpendicularity to the cold are obtained. The half-width 値 (half-width 値 A) of the light emitted from the inner surface of the cathode tube. This result is shown in Table 2. Comparative Example 1 is the same as the example except that the front surface of the queue forming the thin sheet is a plane. The line of the isosceles triangle with a cross section of 50 // m and a vertex angle of 65.4_ degrees is formed on one side. Surface to make a cymbal sheet. This cymbal is placed so that the queuing line faces the light exit surface side of the light guide obtained in Example 2, and the ridge line is parallel to the light incident surface of the light guide. Next, the intensity ratio of the peak 値 brightness of the surface light source device manufactured as described above and the half-width 値 (half-width 値 A) perpendicular to the light distribution in the inner surface of the cold cathode tube were obtained. The results are shown in Table 2. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

This paper ruler; X applies the Chinese National Standard (CNS) A4 specification (21〇χ 297 mm) 594279 A7 B7 V. Description of the invention (printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 〇〇〇◦ / 〇〇ρ · Call Tduc \] 98/1 (N iffil iM xin · jing, ^ S% (N 寸 inch inch inch inch inch inch inch inch inch inch in m 〇o inch inch < 1M 1 $ and £ ^ H cn inch (N 〇 \ (N 00 rH (N 00 t t \ cn in rr—H inch cn cn m 卜? &Quot; 1 ^ cn cn 〇 〇 \ m t tH C \ 卜 ............ i 〇00 ^ ^ -H rH 〇00 00 Os 〇C \ H 〇cn (N o cn 卜 (N quot " 〇 (Ν ο (Ν 口 of the side is 〇inch (N (N mm cn r-H mr-H m ^ -H BU cn rH 00 m τ 1 A BU m rH 00 m τ ......... < 00 cn τ-H ^ s〇rn ^ -H BU CN < N τ-H 〇r-H inch 〇 ( Ν Ο ο ο τ—Η produces ^ N inches (N cn?; R— ^ (N v—H r < m 卜 (N &< t > o cn 〇oo o 00 o τ—H 〇〇m inch 〇 (N CM 〇00 〇inch ο ο ο ο Record 4 < 啭 S 卜 rH 卜 〇! ≫ Ό 〇 mo σ \ o VO o inch o rH 〇ON inch o #inch 0 to om inch o ^ sO m O < N (N 〇 二 o ON oo ο ο ο ο ο ο Oh 〇〇〇〇 卜 〇 〇 00 o un 00 oo ON o ON ooo rH o O rH 0 1 ioo < N rH o in (NHO o 〇om < N oooooo Ό ο ο ο οο I m S IH 晅 魃 ε ^ «〆〇 (N in m 〇 〇 〇 inch in < N inch 〇 inch in inch oo to (N o in IT) ITi BU O o \ 〇 ITi (N o BU o (N rH oo Cn! 〇〇o cn ο ο ο inch) 0 < CQ UQ ω (Jh o HH ho Ph ο 1 1 series 1 dish; 1! 镒-------------------- Order --------- Line Q f (Please read the notes on the back before filling this page) This paper size is applicable China National Standard (CNS) A4 specification (210 X 297 mm) 594279 Λ7 B7 8622pif.doc / 008 V. Description of the invention ㈡A) Industrially available energy components As described above, according to the present invention, At least one of the queues formed by the light incident surface is formed into a convex shape based on the shape of an imaginary queue set by the inclination angle of the light emitted from the peak of the light guide, thereby providing a light source device. From once light The light emitted may be in the viewing direction, in order to efficiently centralize the exit (the amount of the primary light source efficiency), and the light exit surface of the light deflecting element is a flat surface, it can simply be formed Zhuo. Especially in the present invention, at a position closer to the light exit surface than the position of the imaginary queue set based on the inclination angle of the light emitted from the peak of the light guide, the light is deflected toward the plane inclination angle of the light incident surface of the element. The angle of inclination is larger than that of the hypothetical plane.稜鏡 面 In this way, a convex curved surface shape is formed. Accordingly, the present invention can provide a light source device, in which light emitted from the primary light source can be concentratedly emitted in a desired observation direction (utilization efficiency of the light amount of the primary light source), and the light exit surface of the light deflection element is flat. Surface, so it can be easily formed. (Please read the precautions on the back before filling out this page)-· ϋ ϋ ϋ 1 I emmmm «J ϋ __1 __1 I · ϋ ϋ I ▲ Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economics 37 This paper is applicable to China Standard (CNS) A4 (210 X 297 mm)

Claims (1)

594279 8622 pif 3 is the Chinese Patent Application No. 90130632 with no underline amendment. This amendment date was April 29, 1993. The scope of patent application: 1. A light source device, including: a primary light source; a light guide, with a light The incident surface and a light exit surface are such that the light emitted by the primary light source is incident from the light incident surface, the incident light is guided by the light and exited from the light exit surface; and a light deflection element is disposed adjacent to the The light exit surface of the light guide has a light entrance surface at a position facing the light exit surface of the light guide, and has a light exit surface on the opposite side of the light entrance surface; wherein, on the light entrance surface, a light exit surface is formed. A plurality of actual queues arranged side by side, each of which has two actual queues; when the plurality of imaginary queues are arranged in line with the actual queues of the light deflection element When the arrays are arranged at the same pitch, and the apex angle Θ is 50 ° ~ 70 °, the actual planes on the far side from the primary light source make the exit of light emitted from the light exit surface of the light guide. In the light distribution, the peak is emitted It is incident from one of the imaginary planes, and is totally reflected by the inner surface at the other imaginary plane, and then exits from the light emitting surface in the desired direction; according to the imaginary queue, at least one of the actual edges The mirror surface is made into a convex curved surface shape, where the radius of curvature r of the convex curved surface shape is normalized by the arrangement pitch P of these actual queues, and 値 (r / p) is 7 ~ 3 0 〇2. Such as The light source device according to item 1 of the scope of the patent application, wherein the light deflections of the actual curved surfaces of the convex surfaces of the actual prisms of the element and the virtual surfaces of the virtual queues The maximum distance 40 594279 8622 pif3 from d to the actual pitch P (pitch) P ratio (d / p) is. 0.05 to 5% °-3. The light source device according to item 1 of the scope of patent application, wherein in the imaginary queues, the inclination angle of the imaginary surfaces near the primary light source side is 45 degrees or more 90 Degrees below. 4. The light source device according to item 1 of the scope of patent application, wherein the sections of the imaginary queues are isosceles triangles. 5. The light source device according to any one of items 1 to 4 of the scope of patent application, wherein the light exit surface of the light guide and / or the back side of the opposite side # thereof has a directional light exit function surface. 6. The light source device according to item 5 of the scope of patent application, wherein the average inclination angle of the directional light exit function surface is 0.5 ° ~ 15 °. 7. The light source device according to item 5 of the scope of patent application, wherein the directional light emitting function surface is a rough surface or is formed by a plurality of lens rows. 8. —A light source device, including: a primary light source; _ a light guide with a light incident surface and a light exit surface, the light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by Light is emitted from the light exit surface; and a light deflection element is disposed adjacent to the light exit surface of the light guide, and has a light entrance surface at a position facing the light exit surface of the light guide. The light-receiving surface has a light-receiving surface on the opposite side; a plurality of real queues 41 594279 8622 pif 3 are arranged on the light-receiving surface side by side, and each of the actual queues has two Actual surface; when a plurality of imaginary queues are arranged at the same pitch as the arrangement pitch of the actual queues of the light deflection element, and the vertex angle Θ is 5 (T ~ 70 °, the distance from the The actual planes on the far side of the primary light source are such that, in the light distribution of the light emitted from the light exit plane of the light guide, the peak plane exit light is incident from one of the imaginary planes, and the other Once the hypothetical surface is totally reflected by the inner surface, The light emitting surface emits in a desired direction; according to the imaginary queue, at least one of the actual planes is made into a convex curved shape, and the light is deflected toward the convex curved shapes of the actual edges of the element. The ratio of the maximum distance d of the actual planes and the imaginary planes of the imaginary trains to the arrangement pitch P of the actual trains (d / p) is 0.2 ~ 2%. The light source device according to item 8 of the scope, wherein the actual queues and the imaginary queues have a common bottom, the convex curved surface shape is a slightly cylindrical convex shape, and the radius of curvature r is the actual edge値 (r / p) after the regularization of the arrangement pitch P of the mirror rows is 2 to 80. 10. The light source device according to item 8 of the scope of patent application, wherein the imaginary rows are close to the primary light source side The inclination angles of the imaginary planes are 45 degrees to 90 degrees. 11. The light source device according to item 8 of the scope of patent application, wherein the sections of the imaginary queues are isosceles triangles. 12. If applied Patents range from any of items 8 to 11 According to the light source device, the light exit surface of the light guide body and / or the back surface opposite to the light guide has a directional light exit function surface. 42 594279 8622 pif 3 13. As described in item 12 of the scope of patent application The light source device, wherein the average inclination angle of the directional light emitting functional surface is 0.5 ° to 15 °. 14. The light source device according to item 12 of the scope of patent application, wherein the directional light emitting functional surface is rough Or a plurality of lens rows. 15. A light source device, including: a primary light source; a light guide, having a light incident surface and a light exit surface, the light emitted by the primary light source, Incident from the light incident surface, the incident light passes through the light guide, and exits from the light exit surface; and a light deflection element is adjacent to the light exit surface of the light guide, The light exit surface is provided with a light entrance surface, and a light exit surface is provided on the opposite side of the light entrance surface; wherein, on the light entrance surface, a plurality of actual trains arranged side by side are formed. Each column has two actual 稜鏡; At least one of the surfaces is a convex curved surface shape, so that an imaginary light passes over the top of the imaginary ridge adjacent to the peak 値 direction of the outgoing light distribution of the light emitted from the light exit surface of the light guide, at An internal total reflection position of the other imaginary queues of the imaginary queues is closer to the light emitting surface than the total reflection position of the inner surface. At least a part of the actual ridges is more than the The inclination angles of the imaginary queues of the imaginary queues facing the light emitting surface are large. 16. The light source device according to item 15 of the scope of patent application, wherein the actual queues have a common bottom with the imaginary queues, and the 43 594279 8622 pif 3 convex curved surface shape is a slightly convex cylindrical surface shape. And the radius (r / p) of the curvature radius r normalized by the arrangement pitch P of the actual queues is 2 ~ 80. 17. The light source device according to item 15 of the scope of patent application, wherein the light deflection elements of the convex curved surface shapes of the actual queues and the virtual edges of the virtual queues The ratio (d / p) between the maximum distance d of the mirror surface and the arrangement pitch P of the actual queues is 0 force 5 to 5%. 18. The light source device according to item 15 of the scope of patent application, wherein these imaginary In the queue, the inclination angles of the virtual planes near the primary light source side are 45 degrees or more and 90 degrees or less. 19. The light source device according to item 15 of the scope of patent application, wherein the cross-sections of the imaginary queues are isosceles triangles. 20. The light source device according to any one of claims 15 to 19, wherein the exit surface of the light guide body and / or the back surface of the light guide has a directional light exit function surface . 21. The light source device according to item 20 of the scope of patent application, wherein the average inclination angle of the directional light emitting functional surface is 0.5 ° to 15 °. 22. The light source device according to item 20 of the scope of patent application, wherein the surface of the directional light emitting function is a rough surface or an array of a plurality of lens rows. 23. A light source device comprising: a primary light source; a light guide body having a light incident surface and a light exit surface, so that the light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light 44 594279 8622 pif 3 is emitted from the light exit surface; and a light deflection element is disposed adjacent to the light exit surface of the light guide, and has an entrance at a position facing the light exit surface of the light guide. A smooth surface has a light emitting surface on the opposite side of the light incident surface; wherein a plurality of actual queues arranged side by side are formed on the light incident surface, and each of the actual queues has two actual edges. Mirror surface; when a plurality of imaginary queues are arranged at the same pitch as the arrangement pitch of the actual queues of the light deflection element, and the apex angle Θ is 50 ° ~ 70 °, the distance from the primary light source is The actual planes on the far side are such that, in the light distribution of the light emitted from the light exit plane of the light guide, the peak plane light is incident from one of the imaginary planes and the other on the imaginary plane. The palatal surface is totally reflected by the inner surface, and then from this The light surface is emitted in a desired direction; according to the imaginary queue, at least one of the actual surfaces is made into a convex curved shape, wherein the light exit surface of the light guide body and / or the opposite back surface system There is a directional light emitting functional surface, and the average inclination angle of the directional light emitting functional surface is 0.5 ° ~ 15 °. 24. The light source device according to item 23 of the scope of patent application, wherein the actual queues have a common bottom with the imaginary queues, the convex curved surface shape is a slightly convex cylindrical surface shape, and its radius of curvature The r (r / p) normalized by the arrangement pitch P of these actual queues is 2 to 80. 25. The light source device according to item 23 of the scope of patent application, wherein the light deflections of the actual curved surfaces of the convex curved shape of the actual queues of the element and the virtual edges of the virtual queues The ratio (d / p) of the maximum distance Η of the mirror surface to the arrangement pitch P of these actual queues is 45 594279 8622 pif 3 0.05 ~ 5%. 26. The light source device according to item 23 of the scope of application for a patent, wherein in the imaginary queues, the inclination angle of the imaginary surfaces near the primary light source side is 45 degrees or more and 90 degrees or less. 27. The light source device according to item 23 of the scope of patent application, wherein the sections of the imaginary queues are isosceles triangles. 28. The light source device according to any one of claims 23 to 27, wherein the surface of the directional light exit function is a rough surface or an array of a plurality of lens rows. 29. A light source device, comprising: a primary light source; a light guide having a light incident surface and a light exit surface, so that the light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light A light deflection element is disposed adjacent to the light exit surface of the light guide body, and a light incident surface is provided at a position facing the light exit surface of the light guide body; The opposite side of the light incident surface has a light emitting surface, in which a plurality of actual queues are formed on the light incident surface, opposite to the light emitting surface of the light guide body and arranged side by side with each other; The half width 分布 B of the light emitted from the light exit surface perpendicular to the light incident surface and the light exit surface is ° B is 10 ° ~ 36 °, and the light exited from the light deflection surface of the light deflection element is at The half width 値 A of the outgoing light distribution perpendicular to the light incidence surface and the light exit surface is 30 to 95% of the half width 値 B 46 46 594279 8622 pif 3 30. The light source device described in item 29 of the scope of patent application, Where the light is deflected from the light-emitting surface of the element The half-width 値 A of the distribution of the emitted light in the plane perpendicular to the light-body plane and the light-emitting surface is 30 to 80% of the half-width 値 B. 31. The light source device according to item 29 of the scope of patent application, wherein the half of the distribution of the light emitted from the light exit surface of the light deflection element in a plane perpendicular to the light human face and the light exit surface 値 A is 30% to 70% of the half-width 値 B. 32. The light source device according to item 29 of the scope of patent application, wherein the half of the distribution of the light emitted from the light exit surface of the light deflection element perpendicular to the light-emitting surface and the light-emitting surface is 値 A For 5 to 25 g. 33. The light source device according to item 29 of the scope of patent application, the actual edges formed on the light incident surface of the light deflection element | each has two actual edges; when a plurality of imaginary edges The mirror row is a stomach row with the same arrangement pitch of the actual rows of the gastric light deflection elements, and the apex angle Θ is 50. ~ 70. When the actual light planes on the far side of the primary light source are such that the light exiting the light exiting from the light guide, the peak light exits from one of the 彳 g _ prism surfaces Incident 'and totally reflected by the inner surface on another imaginary prism surface, and then emitted from the light-emitting surface in the desired direction; according to the imaginary queue, at least one of the actual surfaces is made into a convex curved shape . 34. According to the light source device described in item 33 of the scope of patent application, the actual queues and the imaginary queues have a common bottom, the 47 594279 8622 pif 3 convex curved shape is a slightly convex cylinder The surface shape, and the radius (r / p) of the radius of curvature r normalized by the arrangement pitch P of these real-world queues is 2 to 80. '35. The light source device according to item 33 of the scope of the patent application, wherein the light is deflected to the actual curved surfaces of the convex curved shape of the actual queues of the element and the virtual queues of the virtual queues. The ratio (d / p) of the maximum distance d of the edge surfaces to the arrangement pitch P of the actual queues is 0.05 to 5%. 36. The light source device according to item 33 of the scope of patent application, wherein in the imaginary queues, the inclination angles of the imaginary β planes near the primary light source side are 45 degrees or more and 90 degrees or less. 37. The light source device according to item 33 of the scope of patent application, wherein the imaginary queues have an isosceles triangle in cross section. 38. The light source device according to any one of claims 33 to 37, wherein the light exit surface of the light guide and / or the back surface of the light guide has a directional light exit function surface. 39. The light source device according to item 38 of the scope of patent application, wherein the average inclination angle of the surface of the directional light exit function is 0.5 ° to 15 °. 40. The light source device according to item 38 of the scope of patent application, wherein the surface of the directional emission function is a rough surface or an array of a plurality of lens rows. 41. A light source device, comprising: a primary light source; a light guide having a light incident surface and a light exit surface, so that light emitted by the primary light source is incident from the light incident surface, and the incident light is guided by the light, 48 594279 8622 pif 3 is emitted from the light exit surface; and #-a light deflection element, which is adjacent to the light exit ~ surface of the light guide, and has a position facing the light exit surface of the light guide The light incident surface has a light emitting surface on the opposite side of the light incident surface; wherein the light emitted from the light exit surface of the light guide is distributed perpendicular to the light incident surface and the light exit surface. The half-width 値 B exceeds 36 °, and the half-width 分布 A of the light emitted from the light-emitting surface of the light deflection element in the plane perpendicular to the light incident surface and the light-emitting surface is 値 A is 30 ~ of the half-width 値 B 70%. Stomach 42. The light source device according to item 41 of the scope of patent application, wherein the half of the distribution of the light emitted from the light exit surface of the light deflection element perpendicular to the light incident surface and the light exit surface is 値A is 30 to 60% of the half-width 値 B. 43. The light source device according to item 41 of the scope of patent application, wherein the half of the distribution of the light emitted from the light exit surface of the light deflection element in the plane perpendicular to the light incident surface and the light exit surface is 値 A It is 30-50% of this half-frame 値 B. Xin 44. The light source device according to item 41 of the scope of patent application, wherein the light emitted from the light exit surface of the light deflection element has a half width of the light distribution in the plane perpendicular to the light incident surface and the light exit surface. A is 5 to 25 degrees. 45. The light source device according to item 41 of the scope of patent application, wherein a plurality of actual queues arranged side by side are formed on the light incident surface, and each of the actual queues has two actual queues. ; When a plurality of 49 594279 8622 pif 3 virtual queues are arranged at the same pitch as the arrangement pitch of the actual queues of the light deflection element, and the top angle Θ is 50 ° ~ 70 °, The actual planes on the far side of the primary light source are such that, in the light distribution of the light emitted from the light exit plane of the light guide, the peak-chirped plane light is incident from one of the imaginary planes, and Another imaginary plane is totally reflected by the inner surface, and then exits from the light emitting surface in a desired direction. According to the imaginary queue, at least one of the actual planes is made into a convex curved shape. 46. The light source device according to item 45 of the scope of patent application, wherein the actual queues have a common bottom with the imaginary queues, the convex curved surface shape is a slightly convex cylindrical surface shape, and its radius of curvature The r (r / p) normalized by the arrangement pitch P of these actual queues is 2 to 80. 47. The light source device according to item 45 of the scope of patent application, wherein the light is deflected to the actual curved surfaces of the convex curved shape of the actual queues of the element and the virtual edges of the virtual queues. The ratio (d / p) of the maximum distance d of the mirror surface to the arrangement pitch P of these actual queues is 0.05 ~ 5% ° 48. The light source device according to item 45 of the scope of patent application, wherein these imaginary 稜鏡In the row, the inclination angles of the virtual planes near the primary light source side are 45 degrees or more and 90 degrees or less. 49. The light source device according to item 45 of the scope of patent application, wherein the imaginary queued cross sections are isosceles triangles. 50. The light source device according to any one of the claims 41 to 49, wherein the light exit surface of the light guide body and / or 50 594279 8622 pif 3 on the opposite side thereof has a Directional light exit function surface. 51. The light source device according to item 50 of the scope of patent application, wherein the average inclination angle of the directional light emitting functional surface is 0.5 to 15 °. 52. The light source device according to item 50 of the scope of patent application, wherein the directional light exit function surface is a rough surface or a surface formed by a plurality of lens rows. 51